Piston rotary pump of variable flow

ABSTRACT

This invention called PISTON ROTARY PUMP OF VARIABLE FLOW. Is a mechanical device destined to impel and/or to compress fluids through the action of a piston guided by driven rotary parts, delineating a rotary movement and at the same time a king pin or pendulum movement within a stator contention case, arranging the chambers that compress and expand during its performance. The pump flow vary thru a simple movement of the device that support the rotation axle of one of the rotary parts.

This invention is called PISTON ROTARY PUMP OF VARIABLE FLOW. Is amechanical device destined to impel and/or to compress fluids throughthe action of a piston guided by driven rotary parts, delineating arotary movement and at the same time a king pin or pendulum within astator contention case, arranging the chambers that compress and expandduring its performance.

SEVERAL VIEWS OF THE DRAWINGS-BRIEF DESCRIPTION

FIG. 1: Lay out view of the pump in its two models or constructionvarying.

FIG. 1Y: Model or varying Y

FIG. 2X: Model or varying X

FIG. 2: Cross-section in front and back of the pump in its two varyingor constructions models.

FIG. 2Y: Varying Y

FIG. 2X: Varying X

FIG. 3: View of the working development of the pump in its two varyingor construction models:

FIG. 3Y (AY, BY, CY): Varying Y

FIG. 3X (AX, BX, CX): Varying X

FIG. 4: Cross-Section in front A and side B of the transference devicefrom the cneter or rotation point of the secondary conductor rotor part.

DETAILED DESCRIPTION OF THE INVENTION

This invention represent a PISTON ROTARY PUMP OF VARIABLE FLOW, issubmitted in two models or construction varying: Y and X, FIG. 1(FIG.1Y, FIG. 1X), FIG. 2 (FIG. 2Y, FIG. 2X), FIG. 3(FIG. 3Y, FIG. 3X). Saidpump is composed by a case 5Y (FIG. 1Y) or 5X (FIG. 1X) of cylindricalhole 8Y (FIG. 1Y) or 8X (FIG. 1X), with an internal circular stator wallHY (FIG. 1Y) or HX (FIG. 1X), where a piston runs inside, 11Y (FIGS. 1Y,2Y, 3Y) or 11X (FIGS. 1X, 2X, 3X) showing a rotation movement and at thesame time a king pin or pendulum movement, due that is driven by twoconducting rotary parts, one is the principal conducting rotary part 12Y(FIGS. 1Y, 2Y, 3Y) or 12X (FIGS. 1X, 2X) which has a rotary center thatcoincides with the center of the internal hole of the case and takes thepiston in a coupling or junction point movable or articulated, UY (FIGS.1Y, 2Y, 3Y), or UX (FIGS. 1X, 2X, 3X), and a secondary conducting rotarypart 10Y (FIGS. 1Y, 2Y, 3Y) or 10X (FIGS. 1X, 2X) that has a rotationcenter 9Y (FIGS. 1Y, 2Y,) or 9X (1X, 2X) exocentric with the case holecenter, taking the piston in a coupling or junction point movable orarticulated SY (FIGS. 1Y, 2Y, 3Y) or SX (FIGS. 1X, 2X, 3X).

The pump, in its two models or construction varying, keeps always thesame functioning concept, which is the characteristics of the inventionthat covers a piston with rotary movement together with a king pin orpendulum within the stator contention case driven by the two rotaryparts, one part rotates with the rotation center of the circumference ofthe case hole and the other rotates keeping an exocentric rotationcenter with the center of the circumference of the case hole. Being,said center, variable in its location, which allows modifying the volumeof flow of the fluid that impels the pump.

Therefore, the constructive difference between the two models or varyingthe pump do not affect the performance, basic characteristics orfundamentals of the invention, which are only secondary and minormodifications in the structure of some of the pump components.

In the model or varying Y of the pump, the principal rotor conductingpart 12Y has a bell shape which in its cross-section or outside shapecoincides exactly with the cylindrical hole of the case 8Y, and in thecross-section or perimeter inside the section of its internal hole, islocated the piston 11Y, which has the shape of an irregularcircumference that follows the running of the king pin or pendulum ofsaid piston.

The par 12Y has ports 14Y that allow the flow of the fluid, because thispart acts as a rotary valve, which is clearly appreciated in FIG. 3.

In the case of the varying or model X, the principal rotary conductingpart 10X has the shape of a lever that fits in a hole or depression,adequately, that has one side of the piston 11X dividing said hole intwo independent chambers between them, RX and PX (FIG. 3X) that compressand expands during the running of the piston and interact with theprincipal chambers LX and MX (FIG. 3X), arranged between the piston andthe stator case hole, allowing the flow of fluid of the principalchambers to the port of exit 15X (FIG. 1X) or entry port 15BX (FIG. 1X)to the corresponding principal chamber, whichever the case, through theports 14X (FIG. 1X) located at both sides of the piston 11X. In thiscase the rotor part 11X, has the function of a rotary valve, opening andclosing the entrance and exit ports 15BX and 15X of the pump. The piston11X requires sealing parts 16X and 16BX (FIGS. 1X, 2X, 3X) that are setup in grooves in both ends of the piston 11X and using springs 17X and17BX (FIG. 1X), allow the proper adjustment of the piston with theinside walls of the stator HX of the case, covering the separationproduced between both, during pendulum displacement or king pin of thepiston, reaching this way to divide the hole of the case in twoindependent chambers between them LX and MX (FIG. 3X).

The pump has a device to move the rotation center of the secondaryconductor rotor part 10Y or 10X (FIG. 4) composed of a body 3 that bearsthe rotor shaft of the secondary conductor rotor part E, which runs in acontention groove K moved by a threaded shaft 1 which is inserted in aport 5 with female thread located in body 3, being the threaded shaft 1fasten by a contention part 7 with a steering wheel 2 at one end totransmit movement through an outside gear.

DESCRIPTION OF THE PERFOMANCE OF THE PUMP

The pump works as follows: the piston inside the stator case is drivenby the principal conductor rotor part that rotates within the case,coinciding its rotation center with the center of the circumference ofthe case hole, therefore, the piston makes a revolving movement withinthe case, but as is connected to a secondary conductor rotor part, thathas an exocentric rotation center with respect to the center of thecircumference related to the cylindrical hole of the case, the pistonmoves as well in a king pin or pendulum at the same time, being thecenter or partial rotation of the pendulum movement of the piston, thecoupling of the piston with the principal conductor part UY or UX. Saidking pin movement, added to the rotation movement, is due to the factthat the piston works as a bond between the principal rotor part andsecondary rotor part, because when the principal conductor rotor partpulls through the piston the secondary rotor part, however, as thesecondary rotor part has a different rotation center than the principalrotor part and is exocentric with respect to the case hole, moves in itsend where the piston is fasten, a variation in the approach to thestator wall HY or HX of the inside hole of the case, displacing from aminimum to a maximum distance and vice versa in the rotation of theparts, unlike of the principal conductor rotor part that has acentralized rotation center with the circumference of the case hole, itsend fasten to the piston keeps always the same distance of approach withthe stator inside wall of the case, there is a variation in the anglebetween the imaginary axis that divides symmetrically the piston allalong, and the imaginary axis that joints the coupling point of theprincipal rotor part with the piston and the rotary axis of the same, asif the secondary rotor part virtually pull and push the piston, whichresults in the king pin or pendulum movement of the piston.

As the piston divides the hole of the case in two chambers, GX and FX,or LX and MX (FIG. 3), when tilt to the right due to the king pinmovement, close or compress the chamber located to the rigth GY (FIG. 3Y(AY)) or LX (FIG. 3X (AX)) and expands the one to its left FY (FIG. 3Y(AY)) or MX (FIG. 3X (AX)), and when changing to the contrary, that isto say tilt to the left, compress the chamber to the left FY (Fig. CY)or MX (Fig. CX) and expands to the right GY (Fig. CY) or LX (Fig. CX)Therefore, in a rotation of the principal conductor rotor part drivingthe piston, it expands and compress the two chambers LX, and MX or GYand FX, each at its respective time.

The pump has at the entrance and exit of the fluid of the respectiveports of entry and exits 15BY and 15Y (FIG. 1Y) or 15BX and 15X (FIG.1X), wich can be opened and closed alternatively by the principalconductor rotor part which has also the function rotary valve, whenrotating.

Other component parts of the pump indicated in the drawings are: thecover 4Y or 4X (FIG. 1) and the entrance and exit ducts of the fluid 7BYand 7X, or 7BX and 7X (FIG. 1).

In all drawings is used the same code for the same part or component.

1. The rotary piston pump of variable flow protected hereunder consistsof a case with an inner cylindrical hole inside which rotation takesplace around a rotation center coinciding with the center of thecircumference that said cylindrical hole forms within the case. It has amain rotor driving or pulling a piston taken by the end at a coupling orjunction point, movable or articulated, which provides the piston with arotation or pivoting axis in relation to the rotor driving it. At thesame time, this piston is connected to or engaged by a secondary rotorat a coupling or junction point, movable or articulated, located at adifferent place from the one of the coupling point between the pistonand the main rotor. This secondary rotor has an eccentric rotationcenter in relation to the center of the circumference of the cylindricalhole of the case.
 2. The rotary piston pump of variable flow, asdescribed under claim 1, is characterized by its structure that has thenecessary means (holes and/or conduits and/or valves) required for fluidinlet to and outlet from the pertinent pump chambers.
 3. The rotarypiston pump of variable flow, as described under claim 1, ischaracterized by a main rotor driving a piston, the rotor being shapedor composed so as to operate as a rotary valve, alternately opening andclosing fluid inlet to and outlet from pump chambers.
 4. The rotarypiston pump of variable flow, as described under claim 1, ischaracterized by a secondary rotor that has a movable rotation centerallowing pump flow variation.
 5. The rotary piston pump of variableflow, as described under claim 4, is characterized by a secondary rotorthat revolves mounted on a movable device intended to vary the locationof the rotation center of said rotor.
 6. The rotary piston pump ofvariable flow, as described under claim 1, is characterized by pumpcomponents provided with different sealing means to improve itswatertightness.
 7. The rotary piston pump of variable flow, as describedunder claim 1, is characterized by components shaped or composed withthe necessary characteristics to improve their operation, thus reducingwear, compensating forces, lowering vibration levels, and increasingperformance.
 8. The rotary piston pump of variable flow, as describedunder claim 1, is characterized by a pump that is able to contain morethan one piston and more than one main and/or secondary rotor.
 9. Therotary piston pump of variable flow, as described under claim 1, ischaracterized by having the necessary means to reduce friction and wearin its movable parts (e.g. ball bearings, lubrication channels, etc.).